Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc2d5b77501db1a…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 03:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2e57fbd21b6584b3f731ceb2a54fdff2 SHA-1: 5614f2fa0e93e33cb2057419e5fd22b83ddab0e8 SHA-256: 9cc2d5b77501db1a3da6bddf337578077fb2cbf5e2bed610352e966baf7dea07
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a high likelihood of this being a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://thoitranglani.com/upload/files/rixobipavobuwetozax.pdf In PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210914_1E72A192E93F057B.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/mizovebejofekaforak.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147f220d2b33---21381919659.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/52197417062.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614df76d299ed---gatigatekavow.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/75024377215.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/49372545508.pdfIn PDF document text
    • http://stylekd.ru/files/wixexof.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/77603251402.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/76654400909.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/rajubupepovateveb.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/30016324690.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/52710398369.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/85630654867.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/59299724858.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/sozenogogota.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/38718251013.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/73656687786.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202109110316349102.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/gabugevepe.pdfIn PDF document text
    • https://ever-progress.com/upload/files/rejununepulesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=hexadecimal+to+octal+converter+with+solutionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB034 10980 bytes
SHA-256: 2ca1b78f0824525fd2e79751c07c9571d0a9691cdda844ef9da60cd7f2192233
font_01_sfnt_off0000c979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC979 18096 bytes
SHA-256: 634fe4b66bb82a884f22e390158553ee04117c73968c684234d09dea2d291f85
font_02_sfnt_off0000f76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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